(I) It is estimated that 15% of worldwide water
use is for household purposes. (II) These include drinking water, bathing, cooking, and sanitation. (III) Basic household water requirements have been estimated at around 50
liters per person per day, excluding water for
gardens. (IV) In some areas of the world
irrigation is necessary to grow any crop. (V)
Most household water is treated and returned to
surface water systems.

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II III IV V

2. Dieting

While dieting or losing weight, there are often
times when we are tempted to eat things which
we are not supposed to eat. (II) Therefore it is
not very easy for someone to lose body fat and
it can be very frustrating as well. (III) However,
many studies nowadays support the idea that
while dieting one should allow himself to eat
once a week whatever he desires. (IV)
Following a high-protein diet over a long period
of time can cause considerable health
problems. (V) It has been proved that this not
only makes the dieter happy but also helps the
person to continue his diet.

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II III IV V

3. Rainforests

(I) Rainforests are extremely important in the
ecology of the Earth. (II) They cover about 7%
of the Earth's surface and are havens for
millions of plants and animals. (III) The plants of
the rainforests generate much of the Earth's
oxygen and remove carbon dioxide from the
atmosphere. (IV) There are many types of
tropical rainforests in the world. (V) However
these plants are also very important to people in
other ways; many are used in new drugs that
fight disease and illness.